Add pokemon booster box sales to the sets. I would love to see the valuation of each booster box over time. 

Instead of adding multiple of the same game/card in my collection add a quantity field so I can include multiple copies that way.  Then calculate the total value based on the quantity.

A price guide for Pokemon cards from the base set to current sets.

Add more options such as Price Paid to Default options.  Adding all the options that are not there now would be helpful as well. (Condition, Price Paid)

I collect NES and I own some boxes without carts, carts without boxes etc.  I only see a total # of NES items I have, which really doesn't paint the real picture, nor does sit allow me to quickly see if I have that cartridge when I find it out in the wild.  It would be much easier to see a list of carts I do not own.

In addition to physical games, I’d love for pricecharting to be a true representation of my complete video game collection, by including digital format games. 

I’m not terribly interested in their value, so much as I’m interested in seeing the two collections in one succinct place. 

It's be nice to see how much it currently costs to acquire a complete game collection. For example, how much does it cost to own the full SNES library loose, complete in box, and new in box? https://www.pricecharting.com/console/super-nintendo